Researchers investigated the effects of cellulose nanocrystals (CNC), modified with acryloyl chloride or a cationic surfactant (HDTMA), on  a bio-based nanocomposite UV-cured coating system based on he nonpolar polymer matrix (acrylated epoxidized soybean oil (AESO)). The tensile strength and modulus of elasticity (MOE) of the cured film coatings increased with the addition of CNC. Hardness, Er, MOE and tensile strength increased with CNC loading level in the matrix. … Continue reading Bionanocomposite coatings with modified cellulose nanocrystals (CNC)

Researchers from China prepared a series of bio-based polyols from olive, castor, corn, canola, rice bran, grape seed and linseed oil by thiol-ene photo-click reaction and the The relationship between carbon-carbon double bonds in the backbone of vegetable oil fatty acid chains and the functionalities of the polyols were investigated. Moreover, thiol-ene photo-click reaction and traditional methods for vegetable oil based polyols were compared. ıt was found that increasing … Continue reading Bio-based cationic waterborne polyurethanes dispersions

Abstract Renewable based materials have come out as an environmentally friendly alternative to petrochemical based materials due to their sustainability, lower carbon footprints and often lesser price. A tri-functional acrylate monomer was synthesized from Ricinoleic acid (RA) and used as biobased reactive diluent along with an oligomer for a UV curable coating application. The ricinoleic acid was modified by using sodium methoxide catalyzed amidation with … Continue reading Development of tri-functional biobased reactive diluent from ricinoleic acid for UV curable coating application

Abstract Bio-based Non-Isocyanate Polyurethanes (NIPUs) were synthesized by bulk polyaddition of diamine with carbonated sunflower oil (CSFO). Carbonated vegetable oils were obtained by solvent-free mixture reaction of CO2 with epoxidized sunflower oil under the conditions (120 °C, 50 bar) and characterized by FTIR, 1H NMR, and 13C NMR. Finally, the effect of the amine structure as well as CSFO/amine molar ratio (1:0.75, 1:1 and 1:2) on mechanical, and chemical properties … Continue reading Solvent and catalyst-free synthesis of sunflower oil based polyurethane through non-isocyanate route and its coatings properties

Abstract Bio-based Non-Isocyanate Polyurethanes (NIPUs) were synthesized by bulk polyaddition of diamine with carbonated sunflower oil (CSFO). Carbonated vegetable oils were obtained by solvent free mixture reaction of CO2 with epoxidized sunflower oil under the conditions (120 °C, 50 bar) and characterized by FTIR, 1H NMR, and 13C NMR. Finally, the effect of the amine structure as well as CSFO/amine molar ratio (1:0.75, 1:1 and 1:2) on mechanical, … Continue reading Solvent and catalyst free synthesis of sunflower oil based polyurethane through non-isocyanate route and its coatings properties

Abstract A series of hyperbranched polyesters were incorporated by the chemical reaction of the dimethylolpropionic acid with trimethylolpropane, pentaerythritol, and glycerol as the core group. The castor oil-based fatty acids were also successfully prepared in order to examine the impact of the biopolyols on the thermo-mechanical characteristics of the waterborne hyperbranched polyurethane. The chemical structure of the polyols and the resulting polymer were characterized. Developing … Continue reading High performance polyurethane dispersion synthesized from plant oil renewable resources: A challenge in the green materials

The development of renewable and viable alternatives to petroleum-based polymeric materials is a major challenge to the long-term environmental and waste management issues of the polymer industry. In this study, a technology platform composed of a series of efficient and quantitative thiol-ene reactions for preparing functional and sustainable polyols is proposed. First, a soybean oil (SO)-based polyol with two hydroxyl groups (MSO) was synthesized through … Continue reading Functional soybean oil-based polyols as sustainable feedstocks for polyurethane coatings

In this work, corn-based 100% renewable carbon poly(trimethylene ether glycol) (P3MG), biodegradable and biocompatible poly(ethylene oxide) (PEO), 4,4′-diphenylmethane diisocyanate (MDI) and sodium 2,4-diamino-benzenesulfonate (SDBS) were used to synthesize novel biobased waterborne poly(urethane-urea) (WPUU) dispersions following an environmentally-friendly process, which avoids the use of organic solvent. The particle size of WPUU dispersions were determined by dynamic light scattering. The molar ratio of PEO/P3MG polyols was varied … Continue reading Synthesis and characterization of environmentally-friendly waterborne poly(urethane-urea)s

Ice accretion and accumulation pose serious challenges for maintaining the operation and performance of outdoor facilities in cold climate. Epoxy resin, with a wide range of formulation possibilities, is widely used as protective coatings for outdoor facilities. However, bisphenol A (BPA), a key ingredient of conventional epoxy, is known to interfere with human’s natural hormones and cause various disorders in the body system. Reduction or … Continue reading Transparent icephobic coatings using bio-based epoxy resin

A new triglycidyl eugenol derivative (3EPO-EU) was synthesized and characterized by spectroscopic techniques, and used as starting monomer in the preparation of novel bio-based thiol-epoxy thermosets. As thiols, commercially available tetrathiol derived from pentaerythritol (PETMP), a trithiol derived from eugenol (3SH-EU) and the hexathiol derived from squalene (6SH-SQ) were used in the presence of 4-(N,N-dimethylamino)pyridine as the basic catalyst. A flexible diglycidyl ether derived from … Continue reading Preparation of new biobased coatings from a triglycidyl eugenol derivative through thiol-epoxy click reaction

In this work, the development of new biobased epoxy networks using phosphonium-based ionic liquids combined with dicyanamide and phosphinate counteranions as initiators of epoxy prepolymers was compared with a biobased epoxy–amine system. Ionic liquids (ILs) displayed high reactivity toward cardanol-based epoxy prepolymers, and the obtained biobased epoxy/IL networks highlighted a glass transition temperature of around 30 °C, an excellent thermal stability higher than 450 °C … Continue reading Development of Sustainable Thermosets from Cardanol-based Epoxy Prepolymer and Ionic Liquids